退火温度对不同成分TRIP780钢组织与拉伸性能的影响
Effect of Annealing Temperature on Microstructure and Tensile Properties of TRIP 780 Steels with Different Compositions
摘 要
借助光学显微镜、扫描电镜、X射线衍射仪和拉伸试验机等检测手段, 研究了退火温度对含钛和不含钛冷轧低碳硅锰系TRIP钢组织和拉伸性能的影响。结果表明: 随着退火温度的升高, 两种试验钢中铁素体含量减少、晶粒尺寸减小, 贝氏体及马氏体含量有所增加, 残余奥氏体含量先降后升; 含钛钢残余奥氏体中的碳含量随退火温度的升高呈略微增加的趋势, 不含钛钢的则呈现先降低后升高的变化规律; 含钛钢在820 ℃退火后的拉伸性能可满足要求。
钛
退火温度
残余奥氏体
拉伸性能
TRIP steel
Ti
annealing temperature
retained austenite
tensile property
Abstract
The effects of annealing temperature on microstructure and tensile properties of cold rolled low carbon Si-Mn TRIP steels with titanium and without titanium were studied by means of optical microscopy, scanning electron microscopy, X-ray diffraction and tensile testing. The results show that, in the tested steel, the ferrite content and grain size decreased, bainite and martensite contents increased and residual austenite content decreased first and then increased with the increase of annealing temperature. The carbon content in retained austenite increased a little in the steel with Ti, and decreased first and then increased in the steel without Ti. The tensile properties of the steel with Ti met the requirement after annealing at 820 ℃.
中图分类号 TG142
所属栏目 试验研究
基金项目
收稿日期 2012/1/26
修改稿日期 2012/11/8
网络出版日期
作者单位点击查看
备注刘刚伟(1986-), 男, 陕西渭南人, 硕士研究生。
引用该论文: LIU Gang-wei,LIU Qing-you,JIA Shu-jun,CAO Jian-chun,LI Shan-shan. Effect of Annealing Temperature on Microstructure and Tensile Properties of TRIP 780 Steels with Different Compositions[J]. Materials for mechancial engineering, 2013, 37(4): 17～21
刘刚伟,刘清友,贾书君,曹建春,李珊珊. 退火温度对不同成分TRIP780钢组织与拉伸性能的影响[J]. 机械工程材料, 2013, 37(4): 17～21
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参考文献
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【7】JIMENEZ-MELERO E, DIJK N H, ZHAO L, et al.Characterization of individual retained grains and their stability in low-alloyed TRIP steels[J].Acta Materialia, 2007, 55(12): 6713-6723.
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